Home > Telescopes > Celestron > Advanced > Celestron Schmidt-Cassegrain telescope SC 203/2032 Advanced C8 AS-GT GoTo

The optics of Celestron SC:

Despite the long focal length of Schmidt-Cassegrain optics, the tube offers a very short length, which makes the system a very compact telescope, which is characterized by extremely light transport properties. The light strikes a molded aspheric Schmidt correcting plate and will continue to cast the spherical primary mirror. This is reflected onto a secondary mirror that reflects it back towards the main mirror. The light beam passes again the primary mirror, which has a central hole. Thus the light into the eyepiece tube located at the bottom will be thrown. Thus, the system is closed and does not suffer from air turbulence, the figure could be worse. Of course this is also an optimal dust protection is provided. The Schmidt plate Multi-layer coating, which makes for light reflex and poor images.

This lens gives you convince a very good picture, contrast and sharpness, and offer great fun for planetary observation. The Schmidt-Cassegrain system is a good all-round device for observation and photography optional with a huge range of accessories. By the end of the tube at the bottom look a simple orientation is possible. Even for occasional Earth observations (eg. in close range for bird watching), the telescope can be used optimally. The SC Celestron optics are designed on an aperture ratio of about 1:10, so also is astrophotography still very possible.

By the primary mirror focusing a very large focus range is guaranteed, which makes it possible to virtually any accessory to adapt. The positioning mechanism for focusing the primary mirror two preloaded ball bearings are used to the "mirror-shifting" (a typical problem when using simple bushings) to be minimized. The use of premium materials such as CNC machined components made of aluminum, cast steel and stainless steel ensures high stability with low weight, so you do not need a very difficult construction, as may be necessary in other optical designs.

Properties of the optics:

• long focal length with short design
• Aluminum tube with a low weight
• quality XLT Mersch compensation layer
• closed system
• preloaded ball bearings for low shifting primary mirror focusing

Delivery of optics:

• optical tube with 203mm aperture and 2032mm focal length
• 25mm Plossl eyepiece
• 1.25 "diagonal
• Mounting rail
• 6x30 finderscope, just

The mount Celestron AS-GT:

The smallest big German mount from Celestron. Since its invention by Joseph von Fraunhofer in 1810, this means of build in the world, "German mount" (Deutsch equatorial mount). It is remarkable that has changed for nearly 200 years of this design almost anything, and nothing could be substantially improved. For astrophotography, the German mount almost a "must"!

The biggest advantage of the "Deutsche mount" is their variability. Unlike the fork mounting one is not set to a particular telescope! Depending on your mood, air quality and target can saddle up different lenses in seconds to the same mount and balance by moving the counterweights and the telescope tube so that the drive motors at the lowest power development in great detail (even photographically exact) can compensate for the Earth's rotation. The purchase of a Celestron AS (Advanced Series) telescope therefore always means the entry into a "telescope" system, in which extension you need to buy not the same in each case and stainless steel tripod mount extra.

The Celestron AS mount is characterized by its extremely high load capacity. Many amateurs to operate up to 13kg heavy telescopes without tracking problems, even for astrophotography. The high stiffness of the AS-mount one hand due to the very thick-walled aluminum cast housing and the other from the two large-sized ball bearings in the so-called "polar axis". The size of the head bearing is that of a car wheel bearing, that's what it actually is. The capacity also depends on the tripod design. Heavy cast aluminum and stainless steel tubes give the height adjustable stand a much higher torsional rigidity than the previously standard aluminum tripods in its class. Trained as a metal accessory tray dampen vibration Aufspannungsdreieck highly effective and provides a secure hold for up to five 1.25 "and 2" eyepieces. The most important addition to high rigidity and accurate bearing is the combination of worm and worm wheel, the real heart of Montierungsantriebs, here was a combination of aluminum bronze worm and worm gear used. An ideal solution for the beginner who wants to work already "heavy equipment". There were two drive screws equipped with ball bearings and so filled with all the mounting demands experienced astrophotographers, not least thanks to the sophisticated NexStar electronics, programmable hand control and the complex control electronics for the servo motors. The electronic equipment of the AS-GT Nexstar hand controller can not miss, not even a "PEC" function, ie the eventual permanent programmable control runout residual error in the field of arc-seconds accuracy, essential for absolute synchronization for astrophotography.

Delivery of the mount:

• Computerized equatorial German mount AS-GT
• Precision worm gears on both axes for extremely smooth tracking and panning
• DC Servo motors with encoders on both axes
• oversized shafts and bearings
• massive castings as the base for increased stability
• ultra-stable adjustable stand with 50 mm thick steel tube legs
• Planetarium software "The Sky" Level 1 with a comprehensive database of about 10,000 items and improved visuals
• More than 40,000 celestial objects in the database
• Hand controller with LCD display (2 lines of 16 characters) that is backlit red to preserve night adaptation
• PC communication interface in the hand controller
• Auxiliary socket and autoguider port on motor drive